/Engine/Source/Runtime/Landscape/Public/LandscapeEdit.h
Texture bulk operations for weightmap reallocation.
void CopyTextureChannel ( [UTexture2D](API\Runtime\Engine\Engine\UTexture2D) * Dest, int32 DestChannel, [UTexture2D](API\Runtime\Engine\Engine\UTexture2D) * Src, int32 SrcChannel )